Spiking Standard 1

d4 C28 alpha alpha alpha (20R)/C29 alpha alpha alpha (20R)-Methyl/Ethylcholestane, 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.

Dichloroacetic acid Surrogate Method 300.1

Cyhexatin, 100µg/ml in Acetonitrile, 5ml